Increasing the breakdown strength of dielectric actuators by using Cu/Cu_xO/silicone dielectric elastomers

Abstract

Cu/CuxO/PDMS films with 15 wt% content of Cu/CuxO exhibited a significantly higher breakdown strength due to the presence of a CuxO layer as the insulating layer, which blocks the formation of conductive networks and reduces the dielectric loss.

A Dielectric Elastomer Actuator That Can Self-Heal Integrally

“…The preparation method of PANI was a modified approach from previous reports . The PDMS-RTV polymer was prepared according to ref .…”

“…The abundant heat generated in such a process will cause combustion of the dielectric elastomer and thus damage the whole actuator. 23,24 Meanwhile, dielectric actuators are easy to be worn or partially damaged during operation, severely restricting their development. 8 To increase the reliability of dielectric actuators, it would be attractive to fabricate devices which can self-heal after a damage or breakdown and continue to operate with unchanged performance.…”

“…Upon dielectric breakdown, the voltage is discharged suddenly between the electrodes. The abundant heat generated in such a process will cause combustion of the dielectric elastomer and thus damage the whole actuator. , Meanwhile, dielectric actuators are easy to be worn or partially damaged during operation, severely restricting their development …”

Optimizing energy harvesting performance of silicone elastomers by molecular grafting of azobenzene to the macromolecular network

“…4,5 However, the dielectric permittivity of PDMS is relatively low ($2.5 at 1 kHz), which has greatly conned its application for high-performance DEG. 6,7 For this respect, two approaches were developed aiming at improving the dielectric permittivity of polymer composite in the past few years. One effective strategy is the addition of highly polarizable ceramic into the PDMS matrix such as barium titanate (BaTiO 3 ), 8,9 titanium dioxide (TiO 2 ), 10 and calcium copper titanate.…”

Influence of core–shell structured conductive fillers on the electromechanical properties of ferroelectric nanocomposites

“…However, the enhancement of e r is often accompanied by a dramatic increase in the elastic modulus and a sharp reduction in the breakdown strength (E b ) [29,30]. These typically issues lead to either a slight increase in the induced strain or a significant reduction in the safety of the devices [31]. Thus, it is important to develop an effective method to improve the ferroelectric and electromechanical properties under low driving voltage in order to facilitate the application of flexible, bendable polymers in the field of portable devices, e.g., wearable and biomedical devices.…”